Red List habitat classification > RL - Marine habitats > RLBLS - Black Sea > BLSA2.42 Communities of Marmara littoral mixed sediment

Communities of Marmara littoral mixed sediment

Quick facts

Red List habitat type code BLSA2.42
Threat status
Europe Data Deficient
EU n/a
Relation to
Source European Red List habitat factsheet
European Red List of habitats reports
European Red List of habitats (Excel table)

Summary

Shores of mixed sediments ranging from muds with gravel and sand components to mixed sediments (pebbles, gravels, sands and mud in more even proportions). By definition, mixed sediments are poorly sorted. Similarly, there is unlikely to be an easily defined boundary between areas of mixed sediment with stable cobbles and boulders, and boulder fields which fall into the rocky shore category. Stable large cobbles or boulders may be present, which support epibiota such as fucoids and green seaweeds more commonly found on rocky and boulder shores. Mixed sediments which are predominantly muddy tend to support infaunal communities, which are similar to those of mud and sandy mud shores. Habitats with sheltered gravelly sandy mud, subject to reduced salinity, mainly on the mid and lower shore, may have an abundant community of ragworms Hediste diversicolor.

Indicators of quality:

Both biotic and abiotic indicators have been used to describe marine habitat quality. These include the presence of particular species, water quality parameters, levels of exposure to a particular exposure as well as more integrated indices which describe habitat function and structure, such as trophic index, or successful stages of development in habitats that have a natural cycle of change over time. There are no known commonly agreed indicators of quality for this habitat, although particular parameters may be set in certain situations, e.g. protected features with Natura 2000 sites, where reference values may have been determined and applied on a location-specific basis. Some potential indicators of quality which can be used are the presence and abundance of indicated characteristic species.

Characteristic species
For full habitat description, please download the habitat factsheet.

Threat status

Synthesis of Red List assessment

Detailed information on the abundance and extent of this habitat is lacking. Information on the quantity and quality of this habitat, including historical or recent trends, is absent. For the purposes of Red List assessment this habitat is therefore considered to be Data Deficient.
EU
Red List Category Red List Criteria
n/a -
Europe
Red List Category Red List Criteria
Data Deficient -

Confidence in the assessment

low
Red List of habitat categories and criteria descriptions

Pressures and threats

  • Agriculture
    • Use of biocides, hormones and chemicals
    • Fertilisation
  • Mining, extraction of materials and energy production
    • Sand and gravel extraction
    • Sand and gravel quarries
    • Removal of beach materials
  • Transportation and service corridors
    • Roads, paths and railroads
    • Port areas
    • Piers / tourist harbours or recreational piers
    • Fishing harbours
    • Industrial ports
    • Shipping lanes
    • Marine constructions
  • Urbanisation, residential and commercial development
    • Urbanised areas, human habitation
    • Industrial or commercial areas
    • Discharges
  • Pollution
    • Pollution to surface waters (limnic, terrestrial, marine & brackish)
    • Marine water pollution
    • Soil pollution and solid waste (excluding discharges)

Habitat restoration potential

The capacity of this habitat to recover after it has been severely damaged is unknown.

Trends in extent

Average current trend in quantity

No occurrence Unknown
EU28 EU28+

Trends in quality

Average current trend in quality

No occurrence Unknown
EU28 EU28+

Conservation and management needs

This habitat is not addressed by any legislation or management aimed at its conservation. Direct engagement of scientists and conservationists in the planning of the management process, analysis of social and economic costs and benefits of different management options, and involvement of diverse stakeholders will be essential to successful implementation of conservation actions.

List of conservation and management needs

  • Measures related to wetland, freshwater and coastal habitats
    • Restoring/Improving water quality
    • Restoring coastal areas
  • Measures related to marine habitats
    • Restoring marine habitats
  • Measures related to spatial planning
    • Establish protected areas/sites
    • Legal protection of habitats and species
    • Manage landscape features
  • Measures related to urban areas, industry, energy and transport
    • Urban and industrial waste management
    • Specific management of traffic and energy transport systems
    • Managing marine traffic
  • Measures related to special resouce use
    • Regulating/Managing exploitation of natural resources on sea

Distribution

For each habitat a distribution map was produced from a wide variety of sources indicating known and potential occurrences of the habitat in 10x10 km grids within Europe. Occurrences in grid cells were given in two classes: actual distribution from relatively reliable sources (surveys, expert knowledge), and potential distribution based on models or less reliable indicators. Please download the fact sheet to see the map.

Geographic occurrence and trends

Seas Present or presence uncertain Current area of habitat (Km2) Recent trend in quantity (last 50 years) Recent trend in quality (last 50 years)
Sea of Marmara Present Unknown Unknown

Extent of Occurrence, Area of Occupancy and habitat area

Extent of Occurrence (EOO) (Km2) Area of Occupancy (AOO) Current estimated Total Area Comment
EU28 N/A N/A N/A This habitat is only present in the Sea of Marmara therefore it does not occur in the EU28
EU28+ 6 Unknown EOO and AOO have been calculated on the available data.
AOO = the area occupied by a habitat measured in number of 10x10 km grid cells.
EOO = the area (km2) of the envelope around all occurrences of a habitat (calculated by a minimum convex polygon).

Characteristic species

The full list of characteristic species and genus are available above from the Summary. The species available in the EUNIS database are shown here.
Algae Ulva rigida
Invertebrates Abra nitida
Invertebrates Aora gracilis
Invertebrates Aphelochaeta marioni
Invertebrates Capitella capitata
Invertebrates Cerastoderma edule
Invertebrates Cirriformia tentaculata
Invertebrates Corophium volutator
Invertebrates Diogenes pugilator
Invertebrates Hexaplex trunculus
Invertebrates Melita palmata
Invertebrates Microprotopus maculatus
Invertebrates Ostrea edulis
Invertebrates Pisidia longimana
Invertebrates Pygospio elegans
Invertebrates Sphaerosyllis taylori
Invertebrates Xantho poressa
Species scientific name English common name Species group
Ulva rigida Algae
Abra nitida Invertebrates
Aora gracilis Invertebrates
Aphelochaeta marioni Invertebrates
Capitella capitata Invertebrates
Cerastoderma edule Invertebrates
Cirriformia tentaculata Invertebrates
Corophium volutator Invertebrates
Diogenes pugilator Invertebrates
Hexaplex trunculus Invertebrates
Melita palmata Invertebrates
Microprotopus maculatus Invertebrates
Ostrea edulis Flat oyster Invertebrates
Pisidia longimana Invertebrates
Pygospio elegans Invertebrates
Sphaerosyllis taylori Invertebrates
Xantho poressa Invertebrates

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Other classifications

Not available
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